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A variable is a name associated with a data value; we say that the variable "stores" or "contains" the value. Variables allow us to store and manipulate data in our programs.
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ExplanatOverfishing occurs "when more fish are caught than the population can replace through natural reproduction," according to the World Wildlife . Once this occurs, the species is no longer "sustainable." Eighty-seven percent of all the world's fish stocks that we know about are at the "breaking point," according to the Environmental Defense Fund (EDF).
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